Excavating and dredging bucket or grapple.



No. 745,443. 7 PATENTBD DEC. 1, 1903.

G. A. MARRDBR. EXGAVATING AND DREDGING BUGKET 0B. GRAPPLE.

APPLICATION PIISD AUG. 30, 1902 no nonm. 4 SHEETS-SHEET 1.

mumm M lllllll PATBNTED DEC. 1, 1903.

c. A. MARRDER. EXGAVATING AND DREDGING BUGKET 0R GRAPPLE.

APPLICATION FILED AUGLBO, 1902. K0 MODEL. 4 SHBETSSHEET 2.

'ILXQOQO I W 226% THE woams PETERS c0. MTO-LXTM,WASH1NGTON, u. c.

N 745,443. PATENTED DEC. '1. 1903. 0,. A. MARRDER.

EXGAVATING AND DRBDGING BUCKET OR GRAPPLE.

APPLIOATIYON nun AUG. 30, 1902.

10 MODEL. 4 SHEETSSHBET 3.

4% Y (gjpn to;

35 $264044 I I 'gmwz rgw i 4 t PATENTED DEC. "'1; 1903.

v c. A. MARRDER. EXGAVATING AND DREDGING BUCKET 0R GRAPPLE.

APPLIGATION FILED AUG. 30. 1902.

4 SHEETS-SHEET 4.

N0 MODEL.

me mama Pzrzas c9, mum-Limo" wAsHmm'mm p4 No. 745,448. Patented December 1, 1903.

UNITED STATES V-PATENT FFICE.

CHARLES A. MARRDER, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO THE HAYWARD COMPANY, OF NEW YORK, .N. Y., A CORPORATION OF NEW YORK.

EXCAVATIN'G AND, DREDGING BUCKET OR GRAPPLE.

SPECIFICATION forming part of Letters Patent No. 745,448, dated December 1, 1903. Application filed AngustSO, 190 2. Serial No. 121,565. (No model.) I

To all whont it mayconqern: invention in which the bucket is designed Be it known that I, CHARLES A. MARRDER, especially for liftingand lowering only. Fig a citizen of the United Statesof America, and 8 is a plan view of same, partly in section. a resident of New-York, borough of Manhat- Fig. 9 is a detail plan View of the intermediate tan, State of New York, have invented cer orstrike block. Fig. 10 is alongitndinal centain new and usefullmprovements in Exca tral section of a form of the invention in which vating and Dredging Buckets or Grapples, of the excavating-bucket is raised and lowered which the following is aspecification. i and the scoop-sections operated .by a single This invention relates to an excavating and suspension-chain and the bucket is sustained o dredging bucket or grapple of the class in fromatraveling carrier, the closing and openwhich grappling scoop sections or jaws are ing of the scoop sections or jaws taking place pivoted to linkscarried by a head-block, the automatically. Fig. 11 is a side elevation of scoop-sections beingprovided withlever-arms this form of the invention in open position, and with opening arms which are respectwo of the scoop sections, however, being I 5, tively pivoted to an intermediate block and omitted for the sake of clearness. Fig. 12 is to a foot-block, the intermediate block being a side elevation in closed position, the lower raised or lowered for the purpose of closing part of the bncket being broken away. Figs.

or opening the scoop sections 13, 14, and 15 are detail views of the inter- The object of the invention is to improve on mediate block. 2 this class of excavating-buckets by consider, Referring to Figs. 1 to 6, inclusive, A inably increasing the power thereof to enter and dicates the grappling scoop-sections; B, the remove a quantity of earth or other material, head-block; O, links pivotally connecting the and especially in case of clay or hard earth to head-block and scoop-sections; a, the leverenahle the same to efficiently penetrate the arms of the scoop-sections; a, the opening- 2 5 same, this being accomplished by less height arms thereof; D, the foot-block to which the and width in the bnckets than heretofore. opening-arms are pivoted, and E the strike- My invention consists of certain features of; block, which is pivotally connected with the construction and combinations of parts, tobe lever-arms a by links F. These parts, with hereinafter described and then particularly the exception. that the intermediate block 0 claimed. 7 is' not a fFstrike-block, are old in the art.

In the accompanying drawings, Figure 1 is .and need not be described in detail to india side elevation of one form of my improved cate the present improvements. It is eviexcavating and dredging bucket shown in dent that the grappling scoop sections or open position, dotted lines indicating its jaws may be two, three, or more to operate as 35 closed position. This form of bucket is deagrapple, bucket-scoop, orclam-shell bucket. sirable where great power of penetration and A characterizing feature of this invention quickness of motion of the scoop-sections are is that the parts areso proportioned and arrequired. Fig. 2 is a plan view of the same. ranged as byturning upwardlyand inwardly Fig. 3 is a detail View of the head, foot, and the ends of the opening-arms a and by so 0 intermediate blocks two of theminsectiondistancing the blocks D and E from each the full lines indicating the position when the other that when the scoop'sections are fully scoop-sections are open and the dotted lines opened by the resistance during penetration indicating closed position of the scoop-secof' the scoop-sections the, block, E strikes tions. Fig. 4 is-a detail plan view of the inupon the foot-block, and therebystiffens and 45 termediate or strike block. liig.- 5 is a lonstrengthens the parts to relieve the same 5 gitudinal central section of this form of the against the shock due to the said resistance. invention atright anglesto Fig. 3, the scoop- In Figs. 1 tofiavblock-and-tackle arrangesections being shown open. Fig. 6 is a detail ment is provided for the purpose of accelerelevation of one of the scoop-sections. Fig. ating the motion of the scoop sections or jaws 5o 7 is a side elevation of a modified form of the and to render them more powerful. To this we will be seen that when an excavating or dredging bucket such as described is lowered by the rope or cable 9 and when the rope or cable K is let out or slackened the scoopsections A will automatically open, due to the weight of the intermediate block E; but this is also due in part to any contents in the bucket. As the lowering is performed quickly and suddenly, the points or lower ends of the scoop-sections A will forcibly strike or penetrate the earth or other material to be grappled, thus striking the block E upon the block D and afiording that strength and resistance which are desirable to distribute the shock properly.

Referring to Figs. 7, 8, and 9, corresponding parts are indicated by the same referenceletters, and the only difference over the described form of the invention other than a possible difierence in the shape is that in place of the operating-rope K an operatingrope L is substituted and the power sheave or pulley is dispensed with, so that the operating cable or rope simply passes or is trained around one pulley M, which is mounted to turn on the intermediate or strike block E. This form of the invention is not so powerful as the main form, but is desirable in certain cases.

In Figs. 10 to 15, inclusive, which exhibit a third form of the invention, N indicates the scoop sections or jaws; O, the head-block; P, foot-block; 19, the opening-arms pivoted to the foot-block; q,links supporting the sections from the head-block,and R the intermediateor strike block, which is shown in detail in Figs. 13, 14, and 15. In this form of the invention a single rope or cable S is preferably used to both lift and lower the bucket and operate the scoop-sections, the same passing over the pulley S,mounted in the-intermediate block R, a guide-pulley S mounted on the headblock, and a pulley on the boom S The intermediate or strike block is not in this form of the invention pivotally connected with the operating-levers N of the scoop-sections.

The operating-levers N carry floating links N the ends n of which are rounded or con- 9", arranged opposite the floating links N so that the ends thereof may pass through the recesses. A turning ring T is located on the upper side of flange r and has recesses 15, adapted to register with the recesses r. fter the bucket has been opened by the release of the floating links from' the block R and the bucket has struck the material to be raised the intermediate block lowers relatively to the adjacent parts. Upon penetration of the material to be raised the bucket is raised, thus bringing the intermediate bloc-k through ring T in engagement with the ends of the floating links that enter recesses r in the block above the ring. The intermediate block and links N now act like a toggle to close the scoop sections or jaws. Just before the bucket reaches the limit of upward motion a shifting-lever U, pivoted to head-block O, is rocked automatically to turn the turning ring by the engagement of its forked or slotted end U with a pin 25 on the turning ring T and register its recesses with the recesses in the block, so that the ends of the floating links may drop through the ring-recesses and the lower recesses in the block, thereby permitting the automatic opening of the scoop sections or jaws and the dropping of the links into the position shown in Fig. 11. The automatic action of the lever Umay be effected in the case of a boom-suspended bucket or grapple by a trip-pin V, supported from the boom, which is engaged by a recessed or slotted cam portion U of the lever. At the commencement of the lowering movement of the bucket the lever U is 'rocked back and the turning ring T turned, so as to close the lower recesses r of the block R. In lowering the block the same snaps past the lower ends of the floating links, as indicated by dotted lines in Fig. 11, so that on raising the block the same will engage the said links, as shown in Figs. 10 and 12. It is evident that the automatic action may be performed in various ways, according to the manner of supporting the bucket and the nature of the traveling support.

What I claim as new is- 1. In an excavating or hoisting bucket, the combination of scoop sections orjaws, a headblock, links connecting the head-block to the scoop sections or jaws, a foot-block, operating-arms pivoted to the foot-block, a strikeblock, leverarms, means for spreading the lever-arms from the strike-block, and'an operating cable or chain, the foot-block receiving the impact of the strike-block, substantially as described.

2. In an excavating or hoisting bucket, the combination of scoop sections or jaws provided with lever-arms and with operatingarms, a head-block, links connecting the head-block to the scoop sections or jaws, a foot-block to which the operating-arms are pivoted, a strike-block for abutting upon the foot-block, links pivoted to thelever-arms and operated from the strike-block, pulleys supported by the head-block and strike-block, and an operating cable or chain, trained a number of times over the pulleys to form a block and tackle, substantially as described.

3. In an excavating or hoisting bucket, the combination of the head-block, foot-block, scoop sections or jaws pivoted to both blocks, an intermediate block, an operating cable or chain for raising and lowering the intermediate block and the bucket, floating links pivoted to the scoop sections or jaws, and suitable means for engaging the free ends of the floating links with the intermediate block,

substantially as described.

4. In an excavating or hoisting bucket, the combination of the head block, foot-block, scoop sections or jaws pivoted to both blocks, an intermediate block, an operating cable or chain for raising'and lowering the intermediate block and the bucket, floating links pivoted to the scoop sections or jaws, and a locking device for confining the free ends of the ing the intermediate block with the floating links, substantially as described.

6. In an excavating and hoisting bucket, the combination of scoop sections or jaws, the head-block supporting them, a foot-block with which the scoop-sections are connected, floating links pivoted tothe scoop-sections, an intermediate block, means for raising and lowering the latter relatively to the other blocks, a turning ring mounted on the intermediate block, both the latter and the ring having registerable recesses, and means for an tom atically turning said ring,substantially as described.

7. In an excavating and hoisting bucket, the combination of scoop sections or jaws, the head-block and foot-block with which they are connected, an intermediate recessed block, a turning ring thereon having recesses to register with the recesses of the intermediate block, floating links on the latter, the ends of which are engaged by said ring, a pivoted lever on the head-block for actuating the turning ring, and means for automatically acting on the pivoted lever when the device is fully raised, substantially as described.

Signed at New York, N. Y., this 26th day of August, 1902.

' CHARLES A. IWIARRDER.

Witnesses:

Gno. L. WHEnLocK, MARIE A. Cohen. 

